<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>基本选择器</title>
    <style>
        div{
            color: black ;
        }
        #taotao{
            color: green;
        }
        #qianqian{
            color: pink;
        }
        .haha{
            color: red;
        }


    </style>
</head>
<body>

<div class="haha">坤坤</div>
<div class="haha">小鹿</div>
<div id="taotao" class="haha"  >滔滔</div>
<div id="qianqian" class="haha" >签签</div>



</body>
</html>